Treasure Adventure World is in Pre-Order - Alpha/Beta access is not currently available, but it will be in 2014.

A huge open-world side-scrolling platform game. Sail the world, searching for ancient artefacts that were once powerful weapons used to fight an evil demon. Upgrade your sail-boat and find gear to enhance your treasure-hunting and fighting potential. Along the way, discover clues to your forgotten past and uncover the mysterious origins of the archipelagic world you live on.